OCR Physics A G484 - The Newtonian World - 11th June 2015

Why was it expected that the temperature of titanium will remain constant? Is it because a change of state doesnt involve a change in temperature and that the energy of the photons is used to 'pull the molecules apart'?

It's the second law mate! Remember Force = rate of change of momentum is what you used in the calculation by equating force and change in momentum.

finding out that Christopher Lee is dead has ruined my good mood from this exam

finding out that christopher lee is dead has ruined my good mood from this exam

I loved the "prove Kelper's 3rd Law" question. For the question about adding He to N in the scuba tank, what volume did people use? I used just the scuba tank volume but I can't remember if you were supposed to use the He tank volume too... I you were then I'm an idiot because I actually knew how to do that question... -_-

I added volume it definitely said "Calculate the pressue in the He and N system" which I took to mean add both volumes

I added volume it definitely said "Calculate the pressue in the He and N system" which I took to mean add both volumes

I thought it was just the N system, I think it would be a bit weird to do both as you would have to think about the volume of the tube wouldn't you (for it to actually be accurate)?

I thought it was just the N system, I think it would be a bit weird to do both as you would have to think about the volume of the tube wouldn't you (for it to actually be accurate)?

I think I probably got 50 +/- 2 marks for this test. I've gotta say it was tricky but not hugely harder than past papers so I'm not sure how low grade boundaries will be. I'm just hoping for 90% UMS :P I'm not a chemist and haven't been since GCSE so I've always sucked at things involving moles meaning I know I've lost about 6/7 marks minimum.

Yes that's what I thought about... But don't take my word for it, I'm notorious for misreading questions when I get excited that I know how to answer them :'

It said in the bit before that the Volume of the H and tube was ///////// so you could do it accurately that way

anyone have paper and can upload picture of that question?

Yep! With the peak at 8Hz

Teachercol has done it, I think he'll post soon

He said good paper for mathematicians, one or two tricky bits but nothing new

I think I agree tbh

It was just a bad day for me

For the Newton's gravitation law word equation, were you meant to give the 'proportion to product of...' answer or did you write out the equation with words instead of symbols? I did the latter.

For the last part of the first question I ended up with

$d=\frac{2u^2}{g_M} \sin \theta \cos \theta$